Programmatically defining Javascript properties in the object constructor -

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i have javascript constructor object containing of fields, , functions read/write them:

function myobj(){     var _settingsstore {         setting1: 1, //default value         setting2: 2, //default value     }      //gets/sets _settingsstore.settingname, other stuff     function _genericset(settingname, settingvalue){}     function _genericget(settingname){}

i'd programmatically create properties around each of fields:

    (var _setting in _settingsstore){         var _str = _setting.tostring();         object.defineproperties(this, {             _str: {                 get: function() {return _genericget(_str)},                 set: function(value) {return _genericset(_str, value)}             }         })     }

my intent _str purely variable, , myobj.setting1 , myobj.setting2 should defined. instead, loop attempts define myobj._str twice:

uncaught typeerror: cannot redefine property: _str

what's going on? , there way desired behavior?

edit: clarify, want happen, unrolled outside of loop:

object.defineproperties(this, {     settings1: {             get: function() {return _genericget("settings1")},             set: function(value) {return _genericset("settings1", value)}         },     settings2: {             get: function() {return _genericget("settings2")},             set: function(value) {return _genericset("settings2", value)}         },         //and on, if there more of them     })

i'm starting over. if want use setters , getters work, , each object has on store hidden in constructor, , wanted reuse generic functions, this:

function myobj(){     var _settingsstore = {         setting1: 1, //default value         setting2: 2, //default value     }      (var _setting in _settingsstore){         makegetset(this, _setting, _settingstore);     } }  function makegetset(obj, key, store) {     object.defineproperty(obj, key, {         get: function() { return _genericget(key, store)}         set: function(val) {_genericset(key, val, store)}     }) }  function _genericget(key, store){     var val = store[key];     // manipulate val     return val } function _genericset(key, val, store){     // manipulate new val     store[key] = val }

i don't know sort of manipulations you're doing when getting/setting, of maybe shortened.

also, make _settingsstore generic, , use variable scope value storage since need anyway.


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